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Studies on crown ether based potentiometric sensors for 4,4?-dipyridinium and related dications

Moody, G. J., Owusu, Richard and Thomas, J. D. R. (1988) Studies on crown ether based potentiometric sensors for 4,4?-dipyridinium and related dications. The Analyst, 113 (1). pp. 65-69. [Journal article]

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URL: http://dx.doi.org/10.1039/AN9881300065

DOI: doi:10.1039/AN9881300065


Electrodes based on PVC matrix membranes containing one of six crown ethers with 2-nitrophenyl octyl ether or dibutyl phthalate solvent mediator have been studied for their potentiometric response to 4,4′-dipyridyl (DPy), diquat (DQT) and paraquat (PQT) dications. The data are discussed in terms of quality of potentiometric response related to conformational phenomena of crown ethers in their complexation with these dications.Good ion-selective electrode properties were characteristic of the 4,4′-DPy systems based on bis(metaphenylene-32-crown-10)(BMP32C10), bis(metaphenylene-38-crown-12)(BMP38C12), bis(paraphenylene-34-crown-10)(BPP34C10), bis(paraphenylene-37-crown-11)(BPP37C11) and dinaphthalene-36-crown-10 (DN36C10). The calibration slope was between 33 and 41 mV decade–1, extending down to 1.7–6 µM. Interferences from potassium, ammonium, guanidinium, barium, DQT and PQT ions were low except for the BPP34C10 electrode where DQT caused some interference. A sixth electrode, based on dibenzo-30-crown-10 (DB30C10), showed similar calibration behaviour towards 4,4′-DPy but was much less selective.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Nutrition Innovation Centre for Food and Health (NICHE)
ID Code:17397
Deposited By: Dr Richard Owusu-Apenten
Deposited On:03 Mar 2011 14:05
Last Modified:03 Mar 2011 14:05

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